linux-kernel - Re: [sched_delayed] sched: RT throttling activated

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Message-ID: <20130823130629.GZ31370@twins.programming.kicks-ass.net>
Date:	Fri, 23 Aug 2013 15:06:29 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>,
	Theodore Tso <tytso@....edu>,
	Thomas Gleixner <tglx@...utronix.de>, mingo@...hat.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [sched_delayed] sched: RT throttling activated

On Fri, Aug 23, 2013 at 02:33:42PM +0200, Johannes Berg wrote:
> On Fri, 2013-08-23 at 14:10 +0200, Peter Zijlstra wrote:
> 
> > >  2161  FF [irq/50-iwlwifi]
> > 
> > Oh a threaded interrupt, I presume you're not using "threadiqrs" since
> > this is the only interrupt thread around and I see a
> > 'request_threaded_irq()' call in
> > drivers/net/wireless/iwlwifi/pcie/trans.c
> > 
> > And wow, why would that thing consume that much cpu. 
> 
> How much is "that much"?

0.95s worth of time in the past 1s.
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